diff --git a/uom.py b/uom.py
index 76cedb7d97..33c12211f8 100644
--- a/uom.py
+++ b/uom.py
@@ -44,8 +44,6 @@ class Uom(OSV):
                 'default_factor',
                 'default_active',
                 'default_rounding',
-                'on_change_factor',
-                'on_change_rate',
                 ])
 
     def _factor(self, cursor, user, ids, name, arg, context):